Plowpoint



Oct. 12 1926. 1,603,199 1 E. A. ERICKSON PLOWPCINT Filed June 24, 1925 PatentedOct. 12, 1 926. V g I g I UNITED STATES PATENT "OFFICE.

Application filed June724,'1925. Serial no; 39,355.

' This invention relates to improvements in The improved plow point may be stated plow points, having for an object to provide to comprise a single piece of extremely hard a novel form of plow point constructed of and tough metal, such for example, as cast extremely hard and tough metal, which when steel, and is formed into the shape as shown 60 I connected to the plow-share is treated by a in the accompanying drawing, one side theretempering process whereby the same will be of being flattened, as indicated by the nuhardened about the point proper,-while the meral 2 and adapted to be arranged adjacent rearward portions thereof will be hardened the land slide of the plow, while the oppoto aless degree, thereby leaving sufiicient site side of the same is-curved as indicated 65 malleability in the device adjacent its .point by the numeral 3 to correspond to the curvaof jointure with the share to permit of the ture ofthe mold board engaging side of the efficient absorption of such abnormalshocks share I and stresses as may be imparted thereto The'rearward portionof the plow point,

; when encountering hard substances during generally designated by the numeral 4, is 70 usage, and hence, preventing its breaking or adapted 'to be connected bywelding, or; simisnapping. I lar process, to the plow share in the manner It 1s likewise an object of the invention to clearly indicated in the Figures 1 and 4,

provide a plow point whose surface will be and thus, practically becomes an integral sufliciently hard to allow of usage of the portion of the share.- Subsequently to this 7 same. for an-indefinite period of time withjoining of theplow point 2 to the share 1 out necessity of resharpening. v by the welding process, the point and an ad- Other objects ,of the invention will be in jacent portion of the share is'he'ated in a fur-. parcgbvious, and in part pointed out herenace, or other suitable device, the forward .ma r. a

2 In order that the invention and its mode proper thereof, being brought preferably to portion of the'plow point, that is,- the point 80 I of use may be readily understood by persons a white heat, while the extreme rearward skilled in the art, 1 have in the accompanyportion thereof and the adjacent portion of ing illustrative drawings, and in the dethe plow share is'heated'toa less degree. tailed following description based there- With thepoint and share thusheated, the 85 upon," set out one possible embodiment of the two are then immer d in a cooling solu ion,"

same. suchas cold water, the share being intro- 7 In these 'drawings:@ duced into-the cold water first from the rear-: Figure 1 is'a bottom view of a plow whose ward-end of the same with the plow point share is equipped with the improved point; uppermost. The immersion of the heated 940 Figure 2 is a fragmentary detail inside portion of the p1ow shar e and the highly elevation looking towards the land slide" of heated plowIp i 4 1S qulckly effecte and a plow whose share is equipped with the -i'm-' the tempering fiprocess' resultlngtherefrom proved point; is such as to e ect the cooling of the plow F1 re 3 sa transverse section taken ,on oint 2 ,in a. manner. such as to harden the 95 40 the line 3-3 of Figure 2, looking inthe diorw-ard and rearwardportions of thesame,

rection in-which'tlfe arrows point, as is indicatedby the shading in the F1g- Figure 4 is a fragmentary detail into ures 3 and 5, and dentified by the numer-' plan of a share equipped with the improve als 5 and 6, respectively. The case hardenpoint; and, p I mg of the forward port on of the plow point 100 Figure 5 is a vertical longitudinal section 4, that is, that portlon lndlc'ated by the nuthrough thesame, taken on the line 5-;5 of meral w11l be effected-to a greater degree Figure 4;, looking in the direction in which than will :be the rearward portion thereof,:; the arrows point.- a such as. indicated by the numeral6, thus ren-' Having moreiparticular reference the dering such forward portion of the plow 19;;

60 drawings, in connection with which like point extremely hard andtough and brittle 'characters of reference will designate correin nature, while" the rearward portion there! sponding parts throughout, Ihave shownfor of,- as indicated by the numeral 6,- has a oer? purposes of illustration herein, the improved tain amount 'of malleability left there n, point as being connected to an ordinary form thereb; V imparting to t a degree of flex1b1 lofplow-share, indicated in its. entirety by ity su cient to firmm the improved plow \thenumeral 1. point-- to efiectu y absorb such abnormal shocks and stresses as may be directed there.-. to during usage, asfor example, when the plow: point is abruptly engaged with sub merged or imbedded stone, tree roots, and other hard substances.

welding with the share 1, it will be under stood that the breaking-or snapping of the point adjacent said point of jointure will be avoided, and thereby,- the practicability and efliciency of the devicewill be in no way impaired.

Due to the hardening of the outer surfaces of the plow point 4 and especially about the point proper of the same, as indicated herein by the numeral 5, said plow point will be permitted to be advantageously and s'uccess-' fully used rfor an indefinite period of time without necessity of resharpening, irrespectiv'e of the nature or'characteristi cs of the 7 soil worked or plowed thereby.

' Manifestly, the construction shown is-capableof considerable modification, and such modification as iswithin the scope of -my claim, I consider within the spirit of my .invention.

Because of this remaining property of malleability in the plow point 4 adjacent its point of jointure or I claim The herein described process of treating plow points and securing the same to shares which consists of the joining by welding oi aplow point formed of a metal possessing maximum stress resisting properties and a certain degree of elasticity to the fore 012- tion of a share. formed of correspon ing metal, then subjecting said point to heat to bring the forward portion thereof to a glowing incandescence while the rearward portion of the same is heated to a lesser degree,

gradually shade and decrease the hardening of the remaifing portion of the point through its j ointure with the sharewhereat the physical properties'fof said point will correspond to those of the share. In witness whereof I haire hereunto set my hand,

ERICK A; ERICKSON: 

